在机械加工中,经常碰到诸如梯形槽齿管、多头梯形螺纹和齿条的加工。这些梯形截面加工时都有齿距(周节)、齿形半角和齿厚的要求,传统的方法是采用样板加齿厚卡尺来测量。但在加工过程中测量往往有困难,不能满足预期的需要。 In machining, often encountered such as trapezoidal trough pipe, multi-head trapezoidal thread and rack processing. These trapezoidal cross-section of the processing pitch (week), tooth half-width and tooth thickness requirements, the traditional method is to use the model plus tooth thickness caliper to measure. However, the measurement process often has difficulties, can not meet the expected needs.